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2.
Sprawson, E. , and Bury, F.W.: Chemical Evidence of Organic Content of Human Enamel, Brit. D. J. 49: 397, 1928.
3.
Rosebury, T. , and Gies, W.J.: Simplified Procedure for the Separation and Identification of Protein in Dental Enamel, J. D. Res.9: 299, 1929.
4.
Armstrong, W.D. , and Brekhus, P.J.: Chemical Constituents of Enamel and Dentin . I. Principal Components, J. Biol. Chem. 120: 677, 1937 .
5.
LeFevre, M.L. , and Manly, R.S.: Moisture, Inorganic and Organic Content of Enamel and Dentin From Carious Teeth, J. A. D. A. 25: 233, 1938.
6.
Deakins, M., and Volker, J.F.: Amount of Organic Matter in Enamel From Several Types of Human Teeth, J. D. Res. 20: 117, 1941.
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9.
Pincus, P.: Enamel Protein, Proc. Roy. Soc. Med. 32: 513, 1939. Idem: Qualitative Tests on Human Enamel Protein, Biochem. J.33: 694, 1939.
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Pincus, P.: Further Tests on Human Enamel Protein, Biochem. J. 42: 219, 1948.
11.
Bibby, B.G. : A Study of a Pigmented Dental Plaque, J. D. Res. 11: 855, 1931.
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Manly, R.S. : A Structureless Recurrent Deposit on Teeth , J. D. Res. 22: 479, 1943.
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Rosebury, T. : Biochemical Study of the Protein in Dental Enamel, J. D. Res. 10: 187, 1930.
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Manly, R.S. , and Hodge, H.C.: Density and Refractive Index Studies of Dental Hard Tissues. I. Methods for Separation and Determination of' Purity, J. D. Res. 18: 133, 1939.
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Hess, W.C., and Sullivan, M.X.: The Cysteine, Cystine and Methionine Content of Proteins, J. Biol. Chem. 151: 635, 1943.'
16.
McCarthy, T.E. , and Sullivan, M.X.: A New and Highly Specific Colorimetric Test for Methionine, J. Biol. Chem. 141: 87.1, 1941 .
17.
Hess, W.C., and Sullivan, M.X.: The Determination of Phenylalanine in Protein, Arch. Biochem . 5: 165, 1944.
18.
Block, R.J. : The Basic Amino Acids of Proteins. A Chemical Relationship Between Various Keratins, J. Biol. Chem. 93: 113, 1931.
